INVESTMENTS (Details - Realized gains and gross realized losses from sales or maturities) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Gross Realized Gains	$ 347	$ 832	$ 1,873
Gross Realized Losses	476	319	815
Aggregate fair value of available for sale securities sold	25,100	31,300	30,200
Net realized capital gains (losses)	(129)	500	1,100
Fixed maturity securities
Schedule of Available-for-sale Securities [Line Items]
Gross Realized Gains	331	725	801
Gross Realized Losses	476	300	800
Equity securities available for sale
Schedule of Available-for-sale Securities [Line Items]
Gross Realized Gains	16	107	1,072
Gross Realized Losses	$ 0	$ 19	$ 15

This element represents the aggregate fair value of Available-for-sale securities sold during the reporting period.

No definition available.

Name:	aig_AvailableForSaleSecuritiesSoldFairValue
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

This item represents the gross loss realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities.

+ References

No definition available.

+ Details

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Balance Type:	debit
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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- Details

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